Television receiver

ABSTRACT

A television including a CS digital circuit to receive a CS digital television broadcast signal. A micom circuit detects a broadcast mode of the digital television broadcast. Where the broadcast mode is in a first mode, or usual broadcast mode, the power supply to a video output section and audio output section, for example, is turned on to output video images and sound respectively through a CRT and a speaker. Also, where the broadcast mode is in a second mode, or radio broadcast mode, the power supply to the video output section is turned off. Where the broadcast mode is in a third mode, or data broadcast mode, the power supply to both the image output section and the audio output section is turned off.

BACKGROUND OF THE INVENTION

1. Field of the Invention

This invention relates to television receivers. More particularly, theinvention relates to a television receiver capable of receiving digitaltelevision broadcast signals and analog television broadcast signals,including those over a channel to display images on the display as in ausual broadcast as well as a channel not to display images on thedisplay as in a data broadcast.

2. Description of the Related Art

The digital television broadcast signals include a radio broadcastchannel to broadcast only audio sound and a data broadcast channel tobroadcast data such as computer programs, in addition to usual broadcastchannels for both the video and audio broadcasts. Consequently, if atelevision receiver which is to receive a digital television broadcastsignal selects a usual broadcast channel, video images-and audio soundare respectively outputted through the display and the speaker. If aradio broadcast channel is selected, audio sound is outputted throughthe speaker. If a data broadcast is received, outputted is data througha communication port (interface) onto a personal computer. In such atelevision receiver, if the power to the display is kept on even duringreceiving a radio or data broadcast, useless power consumption results.

Therefore, it is a primary object of this invention to provide a noveltelevision receiver.

It is another object of the present invention to provide a televisionreceiver which can prevent useless power consumption when receiving adigital television broadcast signal.

It is a further object of the present invention to provide a televisionreceiver which is well suited for a digital television broadcast programscheduling system and which is capable of reducing consumption of power.

SUMMARY OF THE INVENTION

A television receiver according to the present invention, comprises: afirst receiving means for receiving a digital television broadcastsignal; a video output means for outputting a video image in response tothe television broadcast signal received by the first receiving means; adetecting means for detecting a broadcast mode of the digital televisionbroadcast signal received by the first receiving means; and a firstcontrol means for enabling or disabling the video output means dependingupon the broadcast mode detected by the detecting means.

Specifically, where the broadcast mode includes a first mode including avideo signal and a second mode not including a video signal, the firstcontrol means including first off means for turning off a power supplyfor the video output means when the detecting means detects the secondmode.

A television receiver, further comprises: an audio output means foroutputting audio sound in response to the television broadcast signalreceived by the first receiving means; and a second control means forenabling or disabling the audio output means depending upon thebroadcast mode detected by the detecting means.

According to the present invention, the first control means enables ordisables the video output means according to a mode detected by thedetecting means. Where the broadcast mode of a digital televisionbroadcast signal being received is in the first mode, the power, forexample, to a display and speaker is turned on to output a video imageand an audio sound respectively through the display and the speaker.Also, where the broadcast mode of a digital television broadcast signalis in the second mode, the power to the display is turned off. Where thebroadcast mode of a digital television broadcast signal is in the thirdmode, the power to both the display and speaker is turned off.Consequently, according to the present invention, it is possible toprevent against useless power consumption because the power to the videooutput means and the audio output means is turned on/off according to abroadcast mode detected.

In one aspect, a television receiver further comprises: a secondreceiving means for receiving an analog television broadcast signal; areceiving mode setting means for setting as to whether to receive thedigital television broadcast signal or the analog television broadcastsignal; and a third control means for disabling the first receivingmeans when the receiving mode setting means made a setting to receivethe analog television broadcast signal.

In another aspect of the present invention, a television receiver iscapable of plotting a scheduling for a digital television broadcastprogram, comprising: a digital broadcast signal receiving means forreceiving a digital broadcast; an external output means for externallyoutputting the digital broadcast signal received by the digitalbroadcast signal receiving means; a display means for displaying a videoimage of the digital broadcast signal; a power supply means forsupplying power to each circuit of the television receiver; a receptionscheduling means for scheduling to receive the digital broadcast; and acontrol means for controlling power to be supplied from the power supplymeans to the display means when receiving a digital broadcast accordingto a scheduling by the reception scheduling means.

A television receiver with this scheduling function, further comprisesan audio output means to output an audio signal of the digital broadcastsignal, wherein the control means controls the power to be supplied fromthe power supply means to the audio output means when a digitalbroadcast is received according to a scheduling by the receptionscheduling means.

Specifically, the control means causes the power supply means to supplypower to the digital broadcast receiving means, the display means andthe audio output means when a scheduling to view a digital broadcast isset in the reception scheduling means to receive a digital broadcastaccording to the scheduling. Also, the control means causes the powersupply means to supply power to the digital broadcast receiving means,the display means and the audio output means and outputs a digitalbroadcast signal for enabling recording to the external output meanswhen a scheduling to view a digital broadcast signal and a scheduling torecord same are set in the reception scheduling means to receive adigital broadcast according to the scheduling. Further, the controlmeans causes the power control means to cut off power to the displaymeans and the audio output means and outputs a digital broadcast signalfor enabling recording to the external output means when a scheduling torecord a digital broadcast is set in the reception scheduling means toreceive a digital broadcast according to the scheduling.

A television receiver according to another aspect of the presentinvention, comprises: a digital broadcast receiving means for receivinga digital broadcast; an analog broadcast signal receiving means forreceiving an analog broadcast; an external output means for outputting adigital broadcast signal received from the digital broadcast signalreceiving means; a display means for displaying video images of thedigital broadcast signal and the analog broadcast signal; a power supplymeans for supplying power to each circuit of the television receiver; areception scheduling means for scheduling to receive the digitalbroadcast; and a control means for controlling power to be supplied fromthe power supply means to the display means when receiving a digitalbroadcast according to a scheduling by the reception scheduling means.

A television receiver, further comprises an audio output means to outputan audio signal of the digital broadcast signal and the analog broadcastsignal, wherein the control means controls power to be supplied from thepower supply means to the audio output means when a digital broadcast isreceived according to a scheduling by the reception scheduling means.

Specifically, the control means causes the power supply means to supplypower to the digital broadcast receiving means, the display means andthe audio output means when a digital broadcast is received according toa scheduling to view a digital broadcast is set by the receptionscheduling means. The control means causes the power supply means tosupply power to the digital broadcast receiving means, the display meansand the audio output means and outputs a digital broadcast signal forenabling recording to the external output means when a digital broadcastis received according to schedulings to view and record a digitalbroadcast set by the reception scheduling means. The control meanscauses the power supply means to cut off power to the analog means, thedisplay means and the audio output means and outputs a digital broadcastsignal for enabling recording to the external output means when adigital broadcast is received according to a scheduling to record adigital broadcast set by the reception scheduling means.

According to the present invention, when a digital broadcast program isrecorded by a VTR or the like, no power is uselessly supplied tounnecessary circuits, thus offering an effect of significantly reducingconsumption of power. For a television receiver to receive a digital oranalog broadcast, where any of the broadcasts is received and recordedonto a VTR or the like, no power is supplied to a circuit of thereceiving section not in signal reception. This can greatly reduce powerconsumption for a television receiver incorporating a plurality ofreceiving sections.

Furthermore, it is possible to reduce power consumption on the videorecording apparatus, by automatically implement a record schedulingstart and end from a television receiver to a video recording apparatussuch as a VTR.

The above described objects and other objects, features, aspects andadvantages of the present invention will become more apparent from thefollowing detailed description of the present invention when taken inconjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a block diagram showing one embodiment of this invention;

FIG. 2 is a block diagram showing a CS digital circuit;

FIG. 3 is an illustrative view showing a remocon transmitter;

FIG. 4 is a flowchart showing a processing in a syscon micom;

FIG. 5 is a flowchart showing one part of an operation of channel selectmicom;

FIG. 6 is a flowchart showing another part of the operation of thechannel select micom;

FIG. 7 is a flowchart showing still another part of the operation of thechannel select micom;

FIG. 8 is an illustrative view showing a menu to be displayed on adisplay;

FIG. 9 is a block diagram showing another embodiment of this invention;

FIG. 10 is a flowchart showing an operation to execute a scheduledcontent in the FIG. 9 embodiment;

FIG. 11 is a flowchart showing the operation to execute the scheduledcontent in the FIG. 9 embodiment;

FIG. 12 is a flowchart showing operations for scheduling in the FIG. 9embodiment;

FIG. 13 is a block diagram showing still another embodiment of thisinvention;

FIG. 14 is a flowchart showing an operation to execute a scheduledcontent in the FIG. 13 embodiment;

FIG. 15 is a flowchart showing the operation to execute the scheduledcontent in

the FIG. 13 embodiment;

FIG. 16 is a flowchart showing operations for scheduling in the FIG. 13embodiment;

FIG. 17 is an illustrative view showing a screen display state in theFIG. 13 embodiment;

FIG. 18 is a block diagram showing a VTR configuration;

FIG. 19 is a block diagram showing still another embodiment of thisinvention; and

FIG. 20 is a block diagram showing further embodiment of this invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring to FIG. 1, a television receiver 10 of this embodimentincludes an antenna 12 to receive a ground wave broadcast and an antenna14 to receive a CS (Communication Satellite) broadcast. Incidentally,the embodiment below explanations will be provided regarding a CSdigital television broadcast as one example of a digital televisionbroadcast. However, it should be pointed out that this invention isapplicable to a television receiver which can receive an arbitrarydigital television broadcast, such as a BS (Broadcasting Satellite)digital broadcast or ground wave digital broadcast.

A ground wave broadcast signal received by the antenna 12 is supplied toa ground wave tuner 20 included in a ground wave receiving circuit 16.As a result of this, a desired channel broadcast signal is selected, andan IF signal on the channel is demodulated by an IF demodulating circuit22. Meanwhile, a CS broadcast received by the antenna 14 is supplied toa CS tuner 26 shown in FIG. 2. As a result of this, a selected desiredchannel of a broadcast signal is processed sequentially by a QPSKdemodulating circuit 28, a descrambler 30 and a demultiplexer 32. AnMPEG decoder 34 creates audio data and video data based on an outputfrom the demultiplexer 32. The audio data is converted into an analogaudio signal by an audio D/A converter 36, while the video data isconverted into a video signal (luminance signal and chrominance signal)with an NTSC format by an NTSC encoder 38.

Incidentally, the CS broadcast includes a radio broadcast to broadcastonly audio sound and a data broadcast channel to broadcast data such ascomputer programs, besides a usual broadcast channel to broadcast bothimages and sound. When the CS tuner 26 selects a data broadcast channel,the data included on the channel is outputted from the descrambler 30via an interface 40 onto a personal computer 42. Also, when the CS tunerreceives a radio broadcast channel, the MPEG decoder 34 outputs onlyaudio data.

A video signal processing circuit 24 included in a video output circuit44 receives a color video signal demodulated by the IF demodulatingcircuit 22 and creates luminance and chrominance signals. A switch 48selects either luminance or chrominance signals from the video signalprocessing circuit 24 or luminance and chrominance signals from a CSdigital circuit 18, and supplies them to a color signal reproducingcircuit 50. The color signal reproducing circuit 50 reproduces an RGBsignal which is deflected in a CRT to which a high voltage is applied bya high voltage circuit 56, wherein a desired video image is displayed.

Meanwhile, the audio signal demodulated by the IF demodulating circuit22 is processed by an audio signal processing circuit 58 and thensupplied to a switch 60. The switch 60 selects either an audio signalfrom the audio signal processing circuit 58 or an audio signal from theCS digital circuit 18, and supplies it to a speaker 62. Accordingly, aground wave or CS broadcast audio sound is outputted through the speaker62.

When a plug receptacle 80 is connected to a power supply and a mainswitch 78 is on, electric power is supplied through a power circuit 76to a micom (micro-computer) 64. At this time, if a remocon (remotecontrolled) transmitted 74 arranged with various keys as shown in FIG. 3is operated, a remocon receiver 72 receives an infrared lay signal fromthe remocon transmitter 74 and supplies key input data to a systemcontrolling micro-computer (syscon micom) 66 and to a channel selectmicom 68 included in a micom circuit 64. The syscon micom 66 causesswitches SW1-SW4 to turn on/off depending upon broadcast modeinformation sent from the channel select micom 68 though a bus 70. Also,the channel select micom 68 selects a desired channel, according to akey input signal and flag information from the syscon micom 66.

Specifically, the syscon micom 66 processes a flowchart shown in FIG. 4,while the channel select micom processes a flowchart shown in FIG. 5 toFIG. 7. Referring first to FIG. 4, the syscon micom 66 in step S1determines whether a power key 74 a shown in FIG. 3 was operated or not.If “YES”, it is determined in step S5 whether an interlinking flag 66 ais set or not. If it is set, in step S7 the switches SW1-SW4 are turnedon to start all the ground wave receiving circuit 16, CS digital circuit18, video output circuit 44 and audio output circuit 46. Meanwhile, ifthe CS flag 66 a has been reset, in step S9 the switches SW2-SW4 onlyare turned on to halt the supply of power to the CS digital circuit 18.That is, if the interlinking flag 66 a has been set, the supply of powerto the CS digital circuit 18 is turned on/off with interlinking to powerkey 74 a operation. Incidentally, this interlinking flag 66 a, where theuser is not to utilize a CS broadcast, can be reset by remote controloperation of the user. Ending the process of step S7 or S9, in step S11flag information is outputted which is representative of whether aninterlinking flag 66 a has been set in the channel select micom 68.

Turning to FIG. 5, the channel select micom 68 determines in step S31whether flag information was inputted from the syscon micom 66 or not.If “YES” here, in step S33 selected is an immediately preceding channel,i.e., a CS or ground wave broadcast channel that has been selected uponturning off the power last time. Then, it is determined in step S35whether an interlinking flag 66 a has been set or not. If “NO” here, itis considered whether the user is not to utilize a CS broadcast and theprocess advances to step S37. This step determines whether a keyoperation was made or not. If “YES”, it is determined in step S39whether that was a menu key operation 74 or not. If “YES”, in step S41 amenu process is made and the process returns to step 37. However, if“NO”, it is determined in step S43 whether the operated key is anumerical key 74 f or not. If “YES”, in step S45 conducted is a signalreceiving process over a desired ground wave broadcast channel accordingto the numerical key and the process returns to step S37. However, if“NO”, the key operation in step S37 is considered to have no bearing ona selection of a ground wave broadcast channel, and the process returnsto step S37 without performing any processing.

Meanwhile, if “YES” is determined in step S35, in steps S47-S55 similarprocesses are made to those of steps S37-S45. If“NO” is determined instep S53, the process returns to step S47 through the processes of stepsS57-S65. That is, if “NO” in step S53, in steps S57 and S59 the CS key74 b and the numerical key 74 f were operated are respectivelydetermined. If “NO” in any one of them, the process returns to step S47.However, if “YES” in both then in step S61 a desired CS broadcastchannel is selected according to that operation. Then in step S63 abroadcast mode is determined for the selected channel, i.e., which isone of a usual broadcast, a radio broadcast channel and a data broadcastchannel. In step S65 a result of the determination (broadcast modeinformation) is outputted to the syscon micom,66, and the processreturns to step S47.

In step S41, S51, the channel select micom 68 processes a subroutineshown in FIG. 7. That is, first in step S70 a menu screen is displayedon a display 82, as shown in FIG. 8. It is determined in step S72whether or not there was a key operation. If “YES” here, in step S74, itis determined whether or not the operated key is a cursor key 74 d. If“YES”, a cursor displayed on the display 82 is moved up/down accordingto a cursor key 74 d operation, and the process returns to step S72. Onthe other hand, if “NO” in step S74, it is determined in step S78whether or not the operated key is a decide key 74 e. If “NO”, the keyoperation is invalidated and the process returns to step S72. However,if “YES”, it is determined in step S80 whether or not the cursor ispointing at (1) of the menu displayed on the display 82. If “YES”, it isconsidered that the user is to utilize a CS broadcast, and in step S82an interlinking flag 66 a is set and process returns. If “NO” in stepS80, it is considered that the user is not to utilize a CS broadcast,and in step S84 the interlinking flag 56 a is reset and the processreturns.

Referring back to FIG. 4, the syscom micom 66 determines in step S13whether or not broadcast mode information was inputted from the channelselect micom 68. If “NO”, it is determined in step S15 whether or notthe power key 74 a was operated. If “NO”, the process returns to stepS13. However, if “YES”, in step S27, the supply of power to the groundwave receiving circuit 16, CS digital circuit 18, video output circuit44 and audio output circuit 46 is ceased, ending the process. On theother hand, if in step S13 broadcast mode information was inputted isdetermined, it is determined in step S17 whether or not the CS broadcastchannel selected by the channel select micom 68 is a usual broadcastchannel. If “YES”, the switches SW3 and SW4 in step S19 are turned on,thereby starting up the video output circuit 44 and audio output circuit46, and the process returns to step S13. On the other hand, if “NO” instep S17, it is determined in step S21 whether the selected channel is aCS broadcast channel or a radio broadcast channel. If “YES” here,broadcast will be only in sound. Accordingly, the switch SW4 is turnedoff, and the process returns to step S13. If “NO” in step S21, abroadcast to be received is considered a data broadcast, and in step S25both the switches SW3 and SW4 are turned off and the process returns tostep S13.

In this manner, where the CS flag 66 a is reset, the syscon micom 66suspends the supply of power to the CS digital circuit 18 so as to notbe utilized by the user. Also, even when the CS flag 66 a is set, if theselected CS broadcast channel is a radio broadcast channel, the supplyof power to the video output circuit 44 is suspended. If the selected CSbroadcast channel is a data broadcast channel, supply of power to boththe video output circuit 44 and the audio output circuit 46 issuspended. Accordingly, power is supplied only to the required circuits,thereby preventing against useless power consumption.

In this connection, the power to the CS digital circuit 17 if turned offwould offer a power save of approximately 20 W, while the power to thevideo output circuit 44 (CRT 52) if turned off give a power savings ofabout 100 W.

In the meantime, the digital television broadcast above is a systemwherein a viewer, by paying a fee, can schedule to view or record aprogram. The scheduling includes a view scheduling for scheduling solelyto view a program, a record scheduling for scheduling solely to recordonto a video recording apparatus, and a view-and-record scheduling forscheduling to both view and record a program. An embodiment of thepresent invention will be explained below which is well suited for aprogram scheduling system as stated above and which is capable ofpreventing against useless power consumption.

FIG. 9 is a block diagram showing another embodiment of the presentinvention. 14 is a CS antenna to receive CS (Communication Satellite)broadcasts, 18 is a CS digital circuit to receive a CS digitalbroadcast, 40 is an interface to input and output data to and from theCS digital circuit, 42 is a memory card memorized with data on a usersubscribed to digital broadcast, 82 is a CS receiving section configuredby the CS digital circuit 18 and the interface 40 and the memory card42. 84 is an OSD (On Screen Display) circuit to generate a charactersignal such as a letter signal, 54 is a deflecting circuit, 56 is a highvoltage circuit, 86 is a video signal processing circuit, 52 is a CRT(Cathode Ray Tube), 44 is a display section (video output circuit) toprocess these video signals and display video images. 58 is a soundprocessing circuit, 62 is a speaker, 46 is a sound processing section(audio output circuit),configured by the sound processing circuit 58 andthe speaker 62.

Also, 88 is a video output terminal, 90 is an audio output terminal, 64is a micro-computer (hereinafter referred to as “micom”), 72 is aremocon receiver with which a user can give various instructions to thetelevision receiver, 80 is an AC power supply plug receptacle, 92 is amain power circuit for supplying power to the television receiver CSreceiving section 82, display section (video output circuit) 44 andaudio output circuit 46, 94 is a sub power circuit for supplying powerat all times, 96 is a first selector for selecting video output, 98 is asecond selector for selecting audio output, SW11 is a main power supplywhich, SW12 is a switch for cutting off supply of power through the CSreceiving section 82, SW13 is a switch for cutting off supply of powerto the audio output circuit 46, SW14 is a switch for cutting off supplyof power to the audio output circuit 44.

Then the operation will be explained. If the micom 64 selects auser-desired channel according to a user instruction given from theremocon receiver 72, a CS digital broadcast signal received through theantenna 14 is delivered to the CS tuner 26 shown in FIG. 2. As a resultof this, a broadcast signal through the selected desired program channelis processed sequentially by the QPSK demodulating circuit 28,descrambler 30 and demultiplexer 32. The MPEG decoder 34 creates audioand video data based on an output from the demultiplexer 32. The audiodata is converted into an analog audio signal by the audio D/A converter36, while the video data is converted into an NTSC format video signal(luminance signal and chrominance signal) by the NTSC encoder 38.

Incidentally, in the CS broadcast, there are provided, besides acommunication broadcast channel to simultaneously broadcast both videoand audio, a radio broadcast channel to broadcast only audio and a databroadcast channel to broadcast data such as computer programs. When theCS tuner 26 selects a data broadcast channel, the data contained in thechannel is outputted from the descrambler 30 onto a personal computer(not shown) or the like via the interface 40. Also, when the CS tuner 26receives video broadcast channel, the NPEG decoder 34 outputs only audiodata.

The video signal outputted from the CS digital circuit 18 is outputtedthrough the first selector 28 to the video signal processing circuit 86,and video image thereof is displayed on the CRT 52. Also, the deflectingcircuit 54 extracts a synchronous signal from the video signal in thefirst selector 96 to cause the CRT 52 to effect deflection. The highvoltage circuit 56 supplies a high voltage to the CRT 52. Meanwhile, theOSD circuit 86 generates a character signal according to an instructiongiven from the micom 64, and supplies it to the video signal processingcircuit 86 whereby the video signal is superposed upon by the charactersignal.

On the other hand, the audio signal outputted from the CS digitalcircuit 18 is outputted to the audio output circuit 46 through thesecond selector 98 thereby outputting audio sound through the speaker62.

Also, the first selector 96 and the second selector 98 are controlled bymicom 64 so that they can give an output to the video output terminal 88and audio output terminal 90 according to a user's instruction throughthe remocon receiver 72. The video output terminal 88 and audio outputterminal 90 are connected, for example, to a (not-shown) video recordingapparatus, such as VTR, to record the video signal through the videooutput terminal 98 as well as the audio signal through the audio outputterminal 90.

On the other hand, as for the power supply, a commercial power from theAC power plug receptacle 80 is inputted through the main switch SW1 tothe main power circuit 92. The main power circuit 92 supplies a powervoltage via the switch SW12 to the CS receiving section 82, a powervoltage to the audio output circuit 46 via the switch SW13, and a powervoltage to the display section (video output circuit) 44 via the switchSW14. These power supply switches SW1, SW12, SW13 and SW14 areon/off-controlled by micom 64 so that they are turned on/off dependingupon a state of program viewing to thereby cut off supply of powervoltage to a needless circuit.

Meanwhile, the commercial power from the AC power plug receptacle 80 isalso supplied to the sub power circuit 94 so that the micom 64, firstselector 94, and the second selector 98 are supplied by power voltage atall times and placed in an active state.

This digital broadcast allows the user to schedule a program to be airedin the future. By selecting such a program, selection is furtherpossible among only viewing, viewing with recording on VTR, andrecording using VTR. If a view scheduling has been made, when a programstart time is reached, program video images will be automaticallydisplayed on the CRT 52 of the television receiver. If a recordscheduling has been made, recording can be made by automatic outputtingthrough the video output terminal 88 and audio output terminal 90.

Here, the operation will be explained in detail on a scheduling for a CSdigital broadcast program, with reference to flowchart of FIG. 12.First, if a user instructs a program scheduling through the remoconreceiver 72, the micom 64 enters to a scheduling mode. Under the controlof the micom 64, a scheduling mode screen as shown in FIG. 17(A) isdisplayed on the CRT 52 according to a letter signal given from the OSDcircuit 84 (S116).

If a program is selected (e.g., “AAA” displayed as shown in FIG. 17(A)),an airing time is automatically inputted (S117). Because the time isfixed on a program basis and further airing time data has beentransmitted, merely selecting a program provides a time setting in anautomatic manner: e.g., in the case of an airing time of 12 o'clock to13 o'clock of FIG. 17(A), display is given as “12:00 to 13:00”. Then,the user sets whether to select this program only for viewing (S118),viewing and recording it to VTR concurrently (S119), or only recordingit onto VTR (S120). For example, if view only is set as shown in FIG.17(A), then displayed is “VIEW SCHEDULING”. This completes the CSdigital broadcast program scheduling (S121). Furthermore, if anotherprogram is desired to plot scheduling, the user may select a programthrough the remocon receiver 72 and repeats the above operation (S122).

Incidentall y, where a scheduling of other than view only has been set,“VIEW+RECORD” is displayed for a view scheduling with a recordscheduling, and “RECORD SCHEDULING” is displayed for a recordscheduling, as shown in FIG. 17(A).

Next, explained is the operation of the television receiver when ascheduled content is executed, with reference to flowcharts of FIG. 10and FIG. 17. First, in a state that no digital broadcast is viewed onthe television receiver, the main power switch SW11 is off (S101). Atthis time, the micom 64 determines whether or not the current time hasreached a user scheduled time (S102). If it has reached a scheduledtime, it is determined whether or not the scheduling is a viewscheduling (S103). If it is a view scheduling, it is determined whetheror not a record scheduling has also been made (S104). If a recordscheduling has been made, the micom 64 turns on the power switch SW11and turns the switches SW12, SW13 and SW14 on to supply power to the CSreceiving section 82, display section 44 and audio output circuit 46.The first selector 96 and the second selector 98 respectively outputdigital broadcast video and audio signals to the display section 44, theaudio output circuit 46, the video output terminal 88 and the audiooutput terminal 90. Also, the CS digital circuit 18 releases copyprotect from the video signal and performs copy control to output avideo signal for enabling record. In this manner it is possible to viewand record the digital broadcast program having been scheduled on thetelevision receiver (S105).

If not a record scheduling (S106), the micom 64 turns the power switchSW11 on, and the switches SW12, SW13 and SW14 on to supply power to theCS receiving section 82, display section 44 and audio output section 46.The first selector 96 and the second selector 98 respectively output adigital broadcast video signal and an audio signal only to the displaysection 44 and the audio output section 46. This enables only viewing(S106).

Also, where only a record scheduling has been made without viewscheduling (S107), the micom 64 turns the power switch SW11 on and theswitch SW12 on to supply power only to the CS receiving section 82 whileturning off the switches SW13 and SW14 not to supply power to thedisplay section 44 and the audio output section 46. The first selector96 and the second selector 98 respectively output a digital broadcastvideo signal and an audio signal only to the video output terminal 88and the audio output terminal 90. Furthermore, the CS digital circuit 18releases copy protect from the video signal to enable recording, andperforms copy control to output a video signal for enabling recording.In this manner, it is possible to record the digital broadcast programhaving been scheduled on the television receiver (S108).

On the other hand, where the main power switch SW11 is on and a digitalbroadcast is being viewed or recorded (S101), the micom 64 determineswhether or not the current time has reached a user scheduled time(S109), entering the operation of the flowchart shown in FIG. 11.

If a scheduled time is reached, it is determined whether or not thescheduling is a view schedule (S110). If a view scheduling, the micom 64turns the switches SW13 and SW14 on, and if not already turned on, tosupply power to the CS receiving section 82, display section 44 andaudio output section 46. The first selector 96 and the second selector98 respectively output a digital broadcast video signal and an audiosignal to the display section 44 and the sound processing section 46,thereby enabling the digital broadcast program to view (S111).Incidentally, the switch SW12 is kept on simultaneously he main powerswitch SW11 is being turned on.

Furthermore, in addition to a view scheduling it is determined whetheror not a record scheduling has also been made (S112). If a recordscheduling has also been made, the micom 17 controls the first selector96 and the second selector to output a digital broadcast video signaland an audio signal also to the video output terminal 88 and the audiooutput terminal 90. Also, the CS digital circuit 18 releases copyprotect from the video signal to enable recording, and makes copycontrol to output a video signal for enabling recording (S113). In thismanner, it is possible to view and record a scheduled digital broadcastprogram by the television receiver. In this case, if a letter signal,e.g., a message “SCHEDULED RECORDING STARTED”, indicative of starting ascheduled recording is superposed over a video signal generated from theOSD circuit 84 and viewed on the CRT 52 screen to notify it to the user,the user can recognize start of recording.

Also, where only a record scheduling has been made without a viewscheduling (S114), the micom 64 keeps the switch SW12 on to supply poweronly to the CS receiving section 82 and turns off the switches SW13 andSW14. The first selector 96 and the second selector 98 output a digitalbroadcast video signal and an audio signal only to the video outputterminal 88 and the audio output terminal 90. Furthermore, the CSdigital circuit 18 releases copy protect from the video image to enablerecording and makes copy control to output a video signal for enablingrecording (S115). Incidentally, at a start of recording no power voltagebecomes supplied to the display section 44. Nothing becomes displayed onthe screen, and the user will be anxious about it as a fault.Accordingly, a letter signal, e.g. “SCHEDULED RECORDING START”indicative of starting scheduled recording, is generated from the OSDcircuit 84 onto the CRT 52 screen, thereby notifying the user (at thistime power voltage is being supplied to the display section 44).

In the meanwhile, where a record scheduling has been made, video andaudio signals are inputted through an external output to a VTR 100 shownin FIG. 18. This VTR 100 is configured by a tuner, a VTR power circuit104, a recording/reproducing section 106 for recording/reproducing onand from a magnetic tape, a video/audio signal processing section 108for processing video and audio signals, a VTR micom 110 for controllingthe VTR 100, a video input terminal 112, an audio input terminal 64, avideo output terminal 116, an audio output terminal 118 and a VTR powerswitch 120. Accordingly, when recording the above record-scheduledprogram, the VTR 100 should be previously set, in its timer, with ascheduling of the same as the record scheduled time to enable recordingvideo and audio signals to be externally inputted. When the recordscheduled time is reached, the micom 110 of the VTR 100 turns on the VTRpower switch 120 so that the VTR power circuit 104 for creating a powervoltage from the commercial power supply through the AC power plugreceptacle 122 supplies power to each circuit. Thus the VTR 100 isoperated to start recording. If the scheduled time is over, the VTRpower switch 120 is turned off to thereby halt VTR 100 operation.

Incidentally, if the VTR micom 110 is controlled through a control line(e.g., a wired connection between VTR controlling terminals provided ina television receiver and a VTR, or an interconnection by incorporatinga television receiver in a VTR) from the television receiver micom 64 inorder to automatically carry out a series of the above operations, thenthe VTR 15 can be automatically started for recording and then stopped.This eliminates the necessity of timer scheduling for the VTR 100. Also,the VTR 100 is allowed to receive a ground wave through the antenna 124and record video and audio signals thereof through the tuner 102.

Next, another embodiment will be shown in FIG. 13. This FIG. 13embodiment is a television receiver configured to receive ground waves,contrary to the FIG. 9 embodiment. Accordingly, the same referencenumerals as those of the FIG. 9 block diagram denote same elements, andthe explanations thereof are omitted to explain only different points.In comparison to FIG. 9, FIG. 13 is added with a ground wave antenna 12,a ground wave receiving section 16 configured by a ground wave tuner 20and an IF demodulating circuit 22, an audio processing circuit 58 forprocessing a ground wave audio signal to an audio output section 46, anda power switch SW15 for turning on/off power voltage to be supplied tothe ground wave receiving section 16. Also, the first selector 96 andthe second selector 98 are arranged to switch ground wave broadcastsignals. Also, modification is made to software for the micom 64.

The operation of this micom 66 will be explained using flowchart of FIG.14, FIG. 15 and FIG. 16. First, the scheduling operations of CS digitaland ground wave broadcast programs are explained, with reference to FIG.16. If the user sets a scheduling mode through the remocon receiver 72(S150), a screen shown in FIG. 17(B) appears. The user can select eitherof a CS digital broadcast program scheduling or a ground wave programscheduling (S151). If a CS digital broadcast program scheduling isselected, a program is selected (S152). Thereafter, performed is a viewscheduling, view-and-record scheduling or record scheduling. Theoperation of from the step S118 to S122 are the same as those of FIG.12.

Meanwhile, for a ground wave broadcast program scheduling a screen asshown in FIG. 17(C) appears so that the user can plot a scheduling byinputting a time and channel through the remocon receiver 72 (S153). Inthis manner, it is possible to plot a scheduling for CS digitalbroadcast and ground wave programs.

On the other hand, the operation of television receiver when executing ascheduled content will be explained with reference to flowcharts of FIG.14 and FIG. 15. First, in a state that a digital broadcast or groundwave broadcast is not being viewed on the television receiver, the mainpower switch SW11 is off (S131). At this time, the micom 64 determinedwhether or not the current time has reached a time scheduled by the user(S132). If the scheduled time is reached, then it is determined whetherthe same scheduling is on a ground wave scheduling or a CS digitalbroadcast scheduling (S138).

If the scheduling is on a CS digital broadcast scheduling, it isdetermined whether or not the same is a view scheduling (S133). If aview scheduling, it is determined whether or not a record scheduling hasalso been made (S134). If a record scheduling has also been made, themicom 64 turns the power switch SW11 on, the switches SW12, SW13 andSW14 on to supply power to the CS receiving station 82, display section44 and audio output section 36 and output section 46, and the switchSW15 off not to supply power to the ground wave receiving station 16.The first selector 96 and the second selector 98 respectively output adigital broadcast image signal and a sound signal to the display section44, audio output section 46, video output terminal 88 and audio outputterminal 90. Also, the CS digital circuit 18 releases copy protect fromthe video signal to enable recording, and makes copy control to output avideo signal for enabling recording. In this manner, it is possible toview and record the scheduled digital broadcast on the televisionreceiver (S135).

If not a record scheduling (S134), the micom turns the power switch SW11on, the switches SW12, SW13 and SW14 on to supply power to the CSreceiving section 82, display section 44 and audio output section 46,and the switch SW15 off not to apply power to the ground wave receivingsection 16. Then the first selector 96 and the second selector output adigital broadcast video signal and an audio signal only to the displaysection 44 and audio output section 46. This enables solely viewing(S136).

Also, where only a record scheduling is made without a view scheduling(S137), the micom 64 turns the power switch SW11 on, the switch SW12 onto supply power only to the CS receiving section 82, and the switchesSW13, SW14 and SW15 off to not supply power to the display section 44,audio output section 46 and ground wave receiving section 16. The firstselector 96 and the second selector 98 output a digital broadcast videosignal and an audio signal only to the video output terminal 88 andaudio output terminal 90. Furthermore, the CS digital circuit 18releases copy protect from the video signal to enable recording, andmakes copy control to output a video signal for enabling recording. Inthis manner, it is possible to record the scheduled digital broadcastprogram on the television receiver (S139).

Furthermore, if the scheduling is on a ground wave broadcast (S138), themicom 64 turns the power switch SW11 on, the switches SW13, SW14 andSW15 on to supply power to the ground wave receiving section 16, displaysection 44 and audio output section 46, and the switch SW12 off not tosupply power to the CS receiving section 82. The first selector 96 andthe second selector 98 respectively output a ground wave broadcast videosignal and an audio signal to the display section 44, audio outputsection 46, video output terminal 88 and audio output terminal 90(S140).

On the other hand, when a digit broaadcast or ground wave broasdcast isbeing viewed with the main power SW11 turned on (S131), the micom 64 atthis time determines whether or not the current time has reached a timescheduled by the user (S141) and the process enters to the flowchartshown in FIG. 15.

If the scheduled time has been reached, it is determined whether thesame scheduling is on a ground wave broadcast scheduling or a CSbroadcast scheduling (S147). If on a CS broadcast scheduling, then it isdetermined whether or not the same scheduling is a view scheduling(S142). If a view scheduling, the micom 64 turns the switches SW12, SW13and SW14 on, if they are not already turned on, to supply power to theCS receiving section 82, display section 44 and audio output section 46,and the switch SW15 off not to supply power to the ground wave receivingsection 16. The first selector 96 and the second selector 98 output adigital broadcast video signal and an audio signal to the displaysection 344 and the audio output section 46 to enable viewing a digitalbroadcast program (S143).

Furthermore, if is also dertermined whether not a record scheduling hasbeen made on the digital broadcast program (S144). If a recordscheduling has also been made, the micom 64 controls the first selector96 and the second selector 98 to output a video signal and an audiosignal to the video output terminal 88 and the audio output terminal 90.Meanwhile, in the CS digital circuit 18, copy control is made to releasecopy protect of the video signal to enable recording and to output avideo signal for enabling recording (S145). In this manner, it ispossible to view and record the digital broadcast program scheduled onthe television receiver. At this time the OSD circuit 84 generates aletter signal, “SCHEDULED RECORD STARTED”, indicative of starting ascheduled recording, to be superposed over a video signal being viewedon the CRT 52 screen thereby notifying it to the user. In a state that arecord scheduled has been made and the user is viewing a CS digitalbroadcast, a ground wave broadcast is outputted in a forcible manner.Alternatively, it is possible to arrange so as to cut off the supply ofpower voltage to the ground wave receiving section 16, display section44 and audio output section 46. signal, “SCHEDULED RECORD STARTED”indicative of starting a scheduled recording, to be superposed over avideo signal being viewed on the CRT 52 screen thereby notifying it tothe user. In a state that a record scheduled has been made and the useris viewing a CS digital broadcast, a ground wave broadcast is outputtedin a forcible manner. Alternatively, it is possible to arrange so as tocut off the supply of power voltage to the ground wave receiving section16, display section 44 and audio output section 46.

Meanwhile, where only a record scheduling has been made without a viewscheduling (S146), the micom 64 turns the switch SW12 on to supply powerto the CS receiving section 18, the switches SW13, SW14 and SW15 on tosupply power also to the display section 44, audio output section 46 andground wave receiving section 16. The first selector 96 and the secondselector 98 output a ground wave broadcast video signal and an audiosignal to the display section 44 and the audio output section 46, and adigital broadcast video signal and an audio signal to the video outputterminal 88 and the audio output terminal 90. Furthermore, the CSdigital circuit 18 releases copy protect from the video signal to enablerecording and makes copy control to output a video signal for enablingrecording (S148). Incidentally, when starting a record scheduling, theOSD circuit 84 generates a letter signal, e.g., a message “SCHEDULEDRECORD STARTED” indicative of starting a scheduled recording onto theCRT 52 screen, thereby notifying the user.

Furthermore, for a ground wave broadcast scheduling (S147) the micom 64turns the switches SW13, SW14 on to supply the display section 44, audiooutput section 46 and ground wave receiving section 16, and the switchSW12 off not to supply power only to the CS receiving section 82. Itshould be noted that, during performing a scheduled recording on a CSdigital broadcast, the switch SW12 is turned on with the supply of powerto the CS receiving section 82 kept. The first selector 96 and thesecond selector 98 output a video signal and an audio signal of a groundwave broadcast over a scheduled channel having been switched over, and aground wave broadcast video signal and an audio signal to the videooutput terminal 88 and the audio output terminal 90. Incidentally,during performing a scheduled recording on a CS digital broadcast, a CSdigital broadcast video signal and an audio signal are outputted to thevideo output terminal 12 and the audio output terminal 13 (S149).

Incidentally, where there is a change in program airing time of a CSdigital broadcast (e.g., an airing time is put off or delayed to start),the data of a changed time will be sent. Consequently, the CS receivingsection 18 may be arranged to supply power at all times. Thisarrangement, if made, e.g., to supply power from a sub power circuit 21as shown in FIG. 19 and FIG. 20, supplies power to the receiving section82 at all times. Due to this, the CS receiving section can afford toreceive at all times data to be sent thereto. If there is a time change,it may be reflected at a start of a scheduled time.

Although the present invention has been described and illustrated indetail, it is clearly understood that the same is by way of illustrationand example only and is not to be taken by way of limitation, the spiritand scope of the present invention being limited only by the terms ofthe appended claims.

What is claimed is:
 1. A television receiver comprising: a firstreceiving means for receiving a digital television broadcast signal; asecond receiving means for receiving an analog television broadcastsignal; a mode setting means for setting an analog receiving mode toreceive only the analog television broadcast signal; a power off meansfor turning off a power supply for said first receiving means when theanalog receiving mode is set; a reception scheduling means forscheduling to receive a digital television broadcast signal by saidfirst receiving means; a first power control means for controlling apower to be supplied to said first receiving means in accordance with ascheduled content by said reception scheduling means; a second powercontrol means for controlling power to be supplied to said video outputmeans in accordance with the scheduled content by said receptionscheduling means; an audio output means for outputting an audio signalof the digital television broadcast signal received by said firstreceiving means; and a third power control means for controlling powerto be supplied to said audio output means in accordance with thescheduled content by said reception scheduling means.
 2. A televisionreceiver according to claim 1, wherein when the scheduled content bysaid reception scheduling means is a view scheduling to view at aparticular time a particular program of the digital television broadcastand that time is reached, said first power control means, said secondpower control means and said third power control means respectivelysupply power to said first receiving means, said video output means andsaid audio output means.
 3. A television receiver according to claim 1,further comprising: an externally output means for externally outputtingthe digital television broadcast signal received by said first receivingmeans; an external output control means for enabling said externaloutput means when the scheduled content by said reception schedulingmeans is a view-and-record scheduling to view and record at a particulartime a particular program of the digital television broadcast and thattime is reached.
 4. A television receiver according to claim 3, whereinsaid external output control means enables said external output meanswhen the scheduled content by said reception scheduling means is arecord scheduling to record at a particular time a particular program ofthe digital television broadcast and that time is reached, and furtherwhen the particular time is reached said second power control means andsaid third power control means respectively cutting off power to saidvideo output means and said audio output means.